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Signal-Server: Backend for Signal Private Messenger
The open-source backend server component supporting the Signal Private Messenger applications across Android, Desktop, and iOS platforms, enabling secure, end-to-end encrypted communication.
Java
Added on 2025年6月11日9,829
Stars2,285
ForksJava
LanguageProject Introduction
Summary
Signal-Server is the essential backend service powering the Signal Private Messenger. It is responsible for handling all client-server communication, message processing, user data management, and ensuring the secure operation of the network.
Problem Solved
Provides a robust, scalable, and security-focused backend infrastructure necessary for a global private messaging service that guarantees end-to-end encryption and user privacy.
Core Features
Secure Message Routing
Handles the routing and delivery of end-to-end encrypted messages between users and groups.
User and Device Management
Manages user registration, device linking, and contact discovery within the Signal ecosystem.
Encrypted Media Transfer
Supports the secure transfer of files and media attachments between users.
Group Messaging Support
Provides the infrastructure for managing group memberships and delivering group messages securely.
Tech Stack
Java
Scala
PostgreSQL
Kafka
Redis
protobuf
Use Cases
While primarily the production backend for Signal Messenger, the codebase serves as a reference and foundation for understanding and potentially building highly secure, scalable messaging infrastructure.
Learning and Research
Details
Studying the codebase to understand how a production-grade end-to-end encrypted messaging backend is architected and implemented.
User Value
Gain deep technical knowledge in secure messaging server design, cryptography integration, and handling large-scale real-time communication.
Contributing to Signal
Details
Contributing to the Signal project by identifying issues, proposing features, and submitting code changes to improve the server's performance, security, or functionality.
User Value
Directly impact the privacy and security of millions of Signal users and contribute to a critical open-source privacy project.
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